Western-novel writer Bobbi Anderson lives in rural Haven, Maine, where she spends most of her time alone, writing, hiking with her dog, with an occasional visit to her neighbor Jim. Jim “Gard” Gardner is an barely functioning alcoholic, failing poet, and anti-nuclear activist; he is also Bobbi’s sometimes lover.
One summer morning, Bobbi and her dog, Pete, are hiking in the woods outside her home when Bobbi stumbles across a metal object that she cannot identify, nor remove from the soil. Intrigued, Bobbi makes a cursory attempt to remove the object but finding it too heavy, and lodged too deep, and thinks to continue hiking and forgot about it. But she finds that she cannot. She is inexplicably drawn to dig the object up. She works for hours the first day, and then finds herself returning day after day, digging endlessly trying to retrieve — desperate to retrieve — the object and find out what it is.
The object has an immediate and hypnotic effect on Bobbi, and her obsession with it begins to take over Bobbi’s life. Despite the fact that bizarre and terrifying events begin happening once she discovers it, Bobbi cannot stop her excavation.
Three weeks after Bobbi’s discovery, “Gard” arrives back in Haven to find Bobbi a changed woman; nearly mad and physically almost dead from the efforts of her digging and other “projects” that have consumed her since finding the object. Bobbi reveals to Gard what she has found — what she calls The Tommyknockers — and he is stunned…not just by her discovery but by the way it has transformed her into someone almost unrecognizable.
The two must decide what they will do with the discovery: the revelation might change the world (if they can convince the world that the Tommyknockers are real) but it also might mean that the two of them would be locked up and interrogated for more information. And there are the fascinating projects that Bobbi has begun to build, things that seem as if they should not exist at all, and certainly not built by a writer with no previous technical skill; things that are of immense importance and value.
To keep it secret means they risk the unearthly pull the object has on them, with no one and nothing to dilute its effects. However it also means that whatever gifts or knowledge the Tommyknockers have to bestow upon the world will belong to just the two of them…at least for a while.
What will they choose? What will the Tommyknockers reveal? What risks are worth taking and what are Bobbi and Gard willing to give up of themselves in or to receive the Tommyknockers wisdom?